XBB.00243 Busbar Capacitor Bank for ABB ULTRA Inverters

The XBB.00243 is a critical busbar capacitor bank (also known as the Busbar VA 6064 / CIT612VA capacitor assembly) designed specifically for the ABB ULTRA series central inverters, including the ULTRA-750, ULTRA-1100, and ULTRA-1500 models.

This capacitor bank plays a key role in the DC-link and busbar system of the inverter. It helps stabilise the DC bus voltage, minimise ripple, and ensure smooth, efficient power conversion in high-power utility-scale solar installations. Due to continuous operation under high thermal and electrical stress, these capacitor banks commonly degrade over time, resulting in increased ripple, efficiency losses, fault codes, or complete inverter shutdowns.

Key Benefits of the XBB.00243

• Engineered for the modular 390 kW power conversion modules used in ABB/Fimer ULTRA central inverters
• Supports high-efficiency performance (up to 98.4% peak efficiency) by maintaining stable DC bus operation
• Allows for targeted replacement without requiring full inverter disassembly in many cases
• Essential spare part for maintaining uptime in large-scale PV plants

At NDC Solar, we specialise in the refurbishment, repair, and spare parts replacement for legacy ABB ULTRA inverters.

Our Refurbishment & Replacement Services for XBB.00243

Our expert technicians offer:

• Detailed inspection and diagnostic testing of existing XBB.00243 capacitor banks
• High-quality replacement or full refurbishment using like-for-like components
• Integration and full-load testing to restore original DC bus stability and inverter performance
• Complete power module and inverter-level refurbishment services

Replacing or refurbishing the XBB.00243 can quickly resolve efficiency drops, prevent cascading failures, and significantly extend the operational life of your ABB ULTRA inverters — all at a fraction of the cost of new equipment or full inverter replacement.

Whether you need a single spare part or a comprehensive site-wide refurbishment program, NDC Solar delivers fast turnaround, proven reliability, and minimised downtime for your utility-scale solar assets.

Contact NDC Solar today for a free evaluation of your ABB ULTRA inverters and XBB.00243 capacitor banks.